Signal GE51 was until fairly recently a GWR lower quadrant semaphore bracket signal, controlling Greenford South Juntion from Greenford East Signalbox, paradoxically located at Greenford West Junction! This junction forms a triangle with the line to Greenford East Junction diverging to the right soon after this signal. If taking this route the right feather would be lit, and the normal service trains on the branch get the left feather to take them into the bay platform at Greenford LUL station. The bubblecar is taking what constitutes the mainline with no feather, round the curve to Greenford West Junction. 12:39, Thursday 4th February 2010. Digital Image No. GMPI4475.
From WSMR Route Learner